Proustite and Astrophyllite Physical Properties

Proustite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.51-5.643.2-3.4

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Uneven, Brittle, Metallic

1.6 Cleavage

Distinct on {10 1 1}

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

2.53

2 10

1.8 Chemical Composition

Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Proustite and Astrophyllite Chemical Formula

While comparing Proustite and Astrophyllite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Proustite and Astrophyllite chemical formula.

Chemical formula of Proustite- Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Black Gemstones

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Proustite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Proustite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Proustite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Proustite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.